By comfortably winning the third Twenty20 international with seven wickets and 3.4 overs to spare, England Women completed their drubbing of Australia Women to win their multi-format Ashes by 12 points to four.

While the Test was drawn in Australia’s favour – with two points for each side – England won the one-day series 2-1 and the Twenty20 series 3-0, sealing the first multi-format series for either gender.

Australia had overtaken England as the leading country for women’s cricket by winning the last 50-over and 20-over World Cups.

“A bit more self-belief,” was what England’s captain Charlotte Edwards said was the key difference, which was particularly evident when England twice chased down their target. “And we’ve won the key moments.”

The third T20 international did not make a good advertisement for women’s cricket because Australia’s batting was poor. The attraction of 20-over cricket lies in big hitting, and Australia could hit only five fours, even though the boundaries were 10 yards further in than for the men’s match that followed.

The best features of the game were England’s fielding, the wicketkeeping on both sides, Australia’s pace bowling and the batting of Lydia Greenway who followed her match-winning 80 – the highest for England in a T20 – in the second international with another unbeaten innings of 35.

Katherine Brunt was player of the match, partly for her opening spell but also for a direct hit run-out from deepish cover that set the standard for England’s fielding. There was no unforced error except one when the England captain’s knees let her down.

Australia’s opening bowling pegged England back to 14 for three as they chased only 92, but it was also pacy enough to offer scope for back-foot shots. There have been bowlers who have consistently reached 70mph – notably Brunt, Ellyse Perry and India’s Jhulan Goswami – but Holly Ferling, a willowy 17-year-old, could raise the bar to new heights.

For the moment, the challenge is hitting boundaries when there is little pace on the ball, and Greenway solved it with her similarities to Eoin Morgan as a wristy left-hander who loves to reverse-sweep.